Locomotive stoker



June 18, 1929. rLyM. LOWER I LocoMoTIvE sToKER Original Filed July 26. 1926 *'3 Sheets-Sheet mv. S NN Nv. Q \/L`T l NN Q P11 /l e8 m1 @N N N QN! Enviar/WT):

June 18, 1929. N. M. LOWER LocoMoTIvE sToKER original Filed July 26 1926 3 Sheets-Sheet 2 QNI.

June 18, 1929. N. M. LOWER LOCOMOTIVE STOKER 3 Sheets-Sheet Original Filed July 26. 1926 Patented June 18, 1929.

UNITED STATES PATENT OFFICE.

NATHAN M. LOWER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, T THE STANDARD STOKER COMPANY INC., 0F NEW YORK, N. Y., A COR- PORATION 0F DELAWARE.

LOCOMOTIVE STOKER.

Application led July 26, 1926, Serial No. 124,872. Renewed November 28, 1928.

The invention relates to locomotive stokersof the scatter feed type, its objects being to secure, with simplicity of construction, a high eiiiciency and durability. In the accompanying drawings, v Fig. 1 is a detail central vertical longitudinal section of a locomotive and its tender, and of the'improved Stoker;

Fig. 2 is a view on the line 2 2 of Fig. 1;

Fig. 4 is a view in perspective ofan element incorporated into the backhead of the locomotive;

Fig. 5 is a detail central longitudinal vertical section of the locomotive and the improved stoker, showing a modified form of construction gig. 6 is a view on the line 6-6 of Fig. 5; an

Fig. 7 is a view on the line 7-7 of Fig. 5..

The invention provides a novel arrangement for hand and power firing through the backhead while giving the forward portion of the power firing means a maximum protection from firebox heat.

In what I regard as the simplest and best form tliatportion 12 of the backhead 10 which lies below the usual firing door 11 is offset or deflected inwardly whereby the opening forming the hand firing door 11 is in effect extended downwardly a suHicient distance to admit a conduit 15 of the power firing means or 'stoker which conduit is desirably located below the deck 40 of the cab 41; and this deflected portion 12 forms an inclined water cooled protecting wall behind which the means for raising the fuel to a convenient height for scattering may be located without materially encroaching on the cab or grate area.

As shown in Fig. 1 the conduit 15 is equipped with a helical screw 18 for delivering the fuel to and forcing it upwardly through aflaring chamber or riser 13 forming a continuation of the conduit and having the curved and forwardly inclined wall 42 and the fiat rear wall 14. As fuel rises above the top of the riser 13 it is struck by a blast from the nozzle 19 and scattered through the grates 20.

The protection of the Stoker afforded .by the water cooled wall 12 is so complete that repairs due to burning which have been a serious source of annoyance and expense with all stokers heretofore known are eliminated.

Fig. 3 is a view on the line 3 3 of Fig. 1

AS one means for securing adequate strength of the backhead in its reorganized form, there may be incorporated into it a heavy ring 21 surrounding the door opening 11, the lower side of the ring being oii'set {inwardl as shown at 22, to form a closure for Vthe u per margin of the wall 12, this ring beiiig preferably of steel, either cast or forged. The sheets of thebackhead are attached to the inner and outer faces of this ring.

The wall 12 is preferably rinclined backwardly from its upper margin, the sheets of which it is formed being attached to the mud ring of the boiler. Preferably the mud ring 1s bowed inwardly, as indicated at 23, the extent of this distortion from normal form depending upon the pitch of the Wall, 12 or the size of the chamber 13. As shown in Fig. 1, the lower margin of the wall 12 is in the plane of the backhead and the mud ring is shown as twisted to avoid the necessity -for bending the sheet portions of the wall.

The plate 14 preferably extends from above the rin opening 11 to the bottom of the backhea being apertured in register with this opening and also for the reception of the transfer conduit 15. The nozzle 19 is conveniently supported by being bolted to the plate 14, as shown in Fig. 1. Steam is served to thi's nozzle by suitable pipes, as 24, three such pipes being shown, each being provided with ahand-controlled valve to facilitate the trimming of the fire. These steam Apipes may be connected to the boiler in any suitable manner.

The conduit A15 may fit loosely within the aperture in the lower portion of the plate 14, a flanged collar 25 being preferably bolted to the plate to provide suitable wearing surface, as shown in Fig. 1, or the conduit/may be connected to the plate 14 by a ball joint 26, as shown in Fig. 5. l

In the construction of Fig. 1, there is preferably secured within the' lower portion of the chamber 13 a bowl 27, positioned to receive the fuel as it is discharged from the conduit 15, and to give it an upward direction with the least possible tendency to packing under the influence of the pressure of the screw 18. This bowl may be extended upwardly, as preferred, to protect the wall 12 from the abrasive action of the fuel. The upper margin of the wall 12 being flat, and of' substan tial width, gives direction to the lower stratum of fuel impelled by the steam jets.

In the construction of Fig. 5, in place of the bowl 27 there is provided a curved tube 28, leading from the aperture 17 upwardly through the chamber 13. The upper end of this tube fits within an aperture in, and is flushed with the upper Surface of a horizontal plate 29, which forms a closure for the chamber 13. Preferably, as shown, the upper margin of the wall 12 inclines downwardly from Yits ends, and the plate 29, being horizontal,

contributes to the even distribution of the fuel over the grate. The forward end of the plate 29 is provided with depending flanges, as 30, resting upon the top of the wall 12. Air may enter through the chamber 13 and between the plate 29 and the top of the wall 12, for protecting the plate and its flanges from the heat. The plate 29 may be provided with suitable deflecting ribs, as 31, on its upper face for facilitating the spreading of the fuel.

The firing opening 11 will, of course, be provided with a Suitable door, as in common practice. This detail, forming no part of the present invention, is not illustrated.

While desirable and efficient forms of construction have been shown and described, the invention may be embodied in other and different formswithin the scope of the appended claims.

In the claims the plate 29 is referred to-as a flange of the conduit or tube 28,'which in effect it is, though for convenience and cheapness of manufacture, and for convenience in replacements they are preferably made as shown, as two interfitting elements.

I claim as my invention 1. In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to enclose a fuel-receiving chamber opening upwardly, and means for delivering fuel into the chamber.

2. In a locomotive stoker','in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel-receiving chamber opening upwardly, the offset vportion being inclined inwardly and upwardly, and means for delivering fuel into the chamber.

3. In a locomotive Stoker, in combination, a boiler having a hollow backhead and a hand firing opening therein, the backhead being offset inwardlybelow such opening to inclose an upwardly open fuel receiving chamber, and means for delivering fuel into such chamber.

4. In a locomotive Stoker, in combination, a boiler having a hollow backhead and a hand firing opening therein, the backhead beingV offset inwardly, vthe offset extending downwardly from the opening and inclosing a fuel receiving chamber, and means for delivering fuel to the chamber.

5; In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the' backhead being inwardly odset to inclose a fuel receiving chamber opening upwardly, a plate attached to the backhead, and forming an outer wall for the chamber, and means for delivering fuel in to the chamber.

6. In a locomotive Stoker, in combination, a boiler having a hollow backhead and a hand firing opening therein, the backhead being offset inwardly, the offset extending downwardly from the opening and inclosing a fuel receiving chamber, a plate attached to the backhead and forming an outer wall for thechamben'and means for delivering fuel to the chamber.

7. In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel-receiving chamber opening upwardly, a conduit delivering to the chamber, and means within the conduit for forcing fuel therethrough and through the chamber.

8. In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel receiving chamber opening upwardly, means for delivering fuel into the chamber, and means for forcing fuel upwardly through the chamber.

9. In a locomotive Stoker, in combination, a .boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel receiving chamber opening upwardly, means for delivering fuel into the chamber, means for forcing fuel upwardly through the chamber, and means for Scattering fuel from the upper end of the chamber over the .furnace grate.

10.f In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel receiving chamber opening upwardly, a plate attached to the backhead and forming an outer wall for the chamber, a conduit opening into the chamber through the plate, and means within the conduit for forcing fuel therethrough and through the chamber.

11. In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to in. close a fuel-receiving chamber opening upwardly, a plate attached to the backhead and forming an outer wall Vfor the chamber, a conduit opening into the chamber through the plate, means within the conduit for forcing fuel therethrough and through the chamber, and means for scattering the fuel as it issues from the chamber.

12. In a locomotive Stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel receiving chamber opening upwardly, a bowl-shaped lining for the chamber, and means for delivering fuel into the chamber.

13. In a locomotive Stoker, inl combination,

a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel-receiving chamber opening upwardly, a conduit leading upwardly through the chamber, and means for delivering fuel into the tonduit.

14. In a loco'motive stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel receiving chamber opening upwardly, a plate attached to the backhead and forming an outer wall for the chamber and having an aperture, a bowl forming a lining for the chamber and being laterally open to the plate aperture, and means for delivering fuel through the plate aperture.

15. In a locomotive stoker, in combination, a boiler having a hollow backhead, a portion of the backhead being inwardly offset to inclose a fuel-receiving chamber opening upwardly, a plate attached to the backhead and forming an outer wall for` the chamber and having an aperture, a bowl forming a lining for the chamber and being laterally open to the plate aperture, a conduit for delivering through the plate aperture, and means within the conduit for forcing fuel therethrough and through the chamber.

16. In a locomotive Stoker, in combination, a boiler having a 4hollow backhead, a portion of the backhead being inwardly offset to inelose a fuel-receiving chamber opening upwardly, a plate attached to the backhead and forming an outer wall for the chamber and having an aperture, a conduit leading from such aperture to the top of the chamber, a conduit delivering to such aperture, and means within the last-named conduit for forcing fuel therethrough and through the conduit within the chamber.

17. In a locomotivestoker, in combination, aboiler having a hollow backhead, a portion of the backhead being inwardly odset to inclose a fuel-receiving chamber opening upwardly, a plate attached to the backhead and forming an outer Wall for the chamber and having an aperture, a bowl forming a lining for the chamber and being laterally open to the plate aperture, a conduit for delivering through the plate aperture and fitting loosely therein, and means within Vthe conduit for forcing fuel therethrough and through the chamber.

18. Ina locomotive Stoker, in combination, a boiler having a backhead and a hand firing opening therein, the backhead being odset inwardly, the olset extending downwardly from the opening and enclosing a fuel re ceiving chamber, a plate secured to the outer surface of the backhead and having an aperture registering with the hand firing opening and defining the bottom thereof, and means for deliverin fuel to the chamber.

19. In com ination, a furnace comprising a firebox having a grate and a hollow upstanding wall, such wall having an aperture for the delivery of fuel by hand and by power, a fuel transfer conduit entering the irebox through the lower portion of such aperture, means for advancing fuel through the conduit, means within the {irebox for deilecting fuel upwardly, means for scattering the fuel from the deflecting means in aerial paths, and a hollow protecting wall inclosing the defleeting means and having its chamber in communication with the chamber of the first named wall.

20. In combination, a furnace comprising a firebox having a grate and an upstanding wall, such wall having a vertically elongated opening adapted to permit hand firing through its upper portion, a fuel transfer conduit entering the firebox through the lower portion of such aperture, means for advancing fuel through the conduit, means within the firebox for deflecting fuel upwardly, the deflecting means being fixed and the conduit being flexibly jointed thereto, and means for scattering the fuel from the de- Hecting means in aerial paths.

21. In combination, a locomotive provided with a frebox and a deck rearwardly of said firebox, the back wall of said rebox having an elongated opening therethrough extending above and below said deck for hand and power firing, respectively, and a fuel conduit delivering into said opening below said deck.

22. In combination, a locomotive provided with a irebox and a deckrearwardly of said firebox, theback wall of said firebox having an elongated opening therethrough extending above and below said deck for hand and power firing therethrough, respectively, a fuel conduit extending from a point below the plane of saidv deck and having its forward end extending upwardly within the lowei portion of said opening, and means for distributing fuel delivered by said conduit over the grates of said firebox.

23. lln combination, a locomotive provided with a firebox and a deck rearward of said firebox, the backwall of the iirebox havin an elongated opening therethrough extending above and below said deck for hand and power firing therethrough, a fuel conduit extending from a point below the plane of said deck and having its forward end extending upwardly in the lower portion of said opening, said forward end of the conduit turning upwardly in continuation of its rear portion for directin the advancing fuel to a suitable height for scattering it over the grates through aerial paths, and means for so scattering the fuel.

24. In combination, alocomotive provided with a. iirebox and a deck rearward oflsaid firebox, the backwall of said fireboxhaving an elongated opening therethrough extending above and below said deck for hand and power firing therethrough, a fuel feeding conduit extending from a point below the plane of the deck, forwardly and upwardly in the lower portion of said opening and having its forward end communicating with the irebox at a height suitable for scattering the fuel over the grate through aerial paths, and means for so scattering the fuel.

25. In combination, a locomotive provided with la lirebox and a deck rearward of said irebox, the backwall of said fireboX having an elongated opening therethrough extending above and below said deck for hand and power firing therethrough, a fuel feeding conduit extending from aV point below the plane of said deck, forwardly and upwardly in the lower portion of said opening and having its forward end communicating with the firebox at a height suitable for scattering the fuel over the grate through aerial paths, means for so scattering the fuel, and a wall protecting the forward end portion of said conduit from the fire and providing a passage for a cooling fluid.

In testimony whereof I alx my signature.

NATHAN M. LOWER. 

